SU43058A1 - Transformer for feeding cathode lamps - Google Patents

Description

In receiving and amplifying devices in which the cathodes of the tubes are powered by an AC network, fluctuations in the supply voltage cause an abnormal mode of the lamps, which negatively responds to the quality of the equipment. In addition, crossing cathodes greatly reduces the lamp life.

To reduce the voltage fluctuations at the terminals of the cathodes of the lamps, it is proposed to wind the transformer feeding the cathodes of the lamps from ferromagnetic material, such as iron, wound in the form of a tape with insulation between the layers.

Such an implementation of the transformer winding of the cathode lamps (kenotron, amplifier, generator, detector) should reduce the voltage fluctuations of the cathodes of the lamp, since iron has a significant temperature coefficient.

In view of the large surface of the tape, such a winding improves the transformer cooling at a high filling ratio.

In FIG. 1 and 2 show in section in two projections a proposed transformer for feeding the cathode lamp filament; FIG. 3-circuit diagram with the use of such a transformer.

(336)

On the iron core 5 (Fig. 1, 2), assembled from insulated iron sheets, there is a primary winding / and a secondary 2. Both these windings can be made of copper conductor. The windings 5 superimposed on the same core and feeding the catothodes of the kenotron and the receiver lamps are made of spirally wound iron tape.

The quality located between the layers of the spiral iron winding of the insulation (shown by dotted line 6) can be paper, varnish or oxidation. Insulation layer 6 is applied on one side of the tape only.

FIG. Figure 3 shows an electrical circuit using the transformer I, 2, 3, 4 described above for heating the kenotron and the receiver lamps. However, a transformer can be built to supply only the kenotron or only the incandescent lamp.

When performing the proposed multiwinding transformer, both the primary winding and the winding connected to the rectifier anodes can be made of aluminum.

The subject matter of the invention.

Claims (2)

1. A transformer for feeding the incandescent lamp of cathode tubes, characterized in that, in order to automatically maintain nocfosriHoro foKa cathode filament due to the large temperature coefficient of the winding, the secondary winding is made of spirally wound ferromagnetic tape, which can be provided with insulation on one side only. 2. The embodiment of the transformer according to claim 1, characterized in that The windings of a spiral-wound ferrmagnetic tape are used as separate windings of a multi-winding transformer, which also has ordinary windings made of copper conductor and intended to feed a number of circuits with and without maintaining constant current.